Ohaeles williams



c. WILLIAMS Jr & J. BEDDING.

Electro-Magnetic Alarm.

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N. PETERS. PH

eta see pa e em.

CHARLES WILLIAMS, JR OF SOMERVILLE, AND JEROME BEDDING, OF

' GHARLESTOWN, MASSACHUSETTS.

Letters Patent No. 111,707, dated February 7, 1871.

IMPROVEMENT IN ELECTR O-MAGNETIC ALARM-BELLS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be'it known that we, CHARLES WILLLuus, J r., of 'Somervillc, and JEROME BEDDING, of Charlestown, both of the county of Middlesex and State ot'Massachusetts, have invented an Improvement in Electric Alarm-Gongs, which we believet-o be new and useful; and we hereby declare that the following is a full and exact-description of the construction and mode of use of the same, reference being bad to the accompanying drawing making a part of this specification.

Figure I is a front views of the apparatus.

. Figure II is a front view of the hammer and hammer-holder.

FigureIII is a side view of the hammer-holder, the cam, the locking-pins, the armature, and armaturelevcr.

Our present improvement is, in many of its features,

the same as the apparatus for which Letters Patent of the United States were granted to us on the 25th day of October, A. 1). 1870, and numbered 108,743, to wit: a revolving bell-hammer, making an entire revolution at each stroke, the san e being put in operation or stopped by the action of a in electro-ma gnet.

The present in'iprovement relates mainly ;to the pins, studs, or detents, and the manner of their action when the revolving hammer is started or stopped by the electro-magn'et and its attached mechanism.

The terminal wires F and G of the magnet E lead to a hattery'and circuit-key, with which they are connccted in the usual ma'nner.

The back-board V supports the lllttgllbh, the frame K of the mechanism, and the alarm-bell It.

A string from the weight Q is wound upon the barrel 1, and turns the gear-wheel O andthe pinion N, that is madetiist to the shaft D1.

The hammer-ladder L is also secured to the same shaft D, and when it revolves the attached hammer describes a full circle.

The hammer M is secured to the holder L by a pin, U, so that it may move forward about one-quarter of an inch, the extent and force of this motion being controlled by the cam S and the spring \V.

The hammer revolves in a plane parallel with the plane of the-frame K until the arm strikes the cam or wiper S, by which it is thrown forward against the inner edge of the bell 1t. As the arm leaves the cam it is carried back to place by the spring NV.

'The armature H of the magnet E is affixed to the bent lever J J, and turns on the shaft or pin T.

Near-the end of the lever J there is a fixed pin or detent, G. Then the magnet is not charged the armature H rests in the position shown in Fig. I, the pin 13, that is fixed in the hannner-holder L, remains in contact with the detent 0.; but when the current passes through the coil of the magnet-the armature is lii'ted. the cnd'J falls, the pin 15 escapes over the detent O, and the hammer arm M begins its revolution in the direction of the arrow in Fig. I.

If the circuit remains closed the hammer moves but a short distance, as the pin A comes in contact with the detent G and prevents its further motion;

W hen the circuit is broken the armature-tails against the stop I, the detent C rises and allows the pin A to pass, thus liberating the hammer, which then completes its revolution and strikes one blow upon the bell, any further motion or repetition of the stroke being prevented by the arrest of the pin B as it comes in contact with the detent O.

To strike a second blow, the circuit must again be closed, when the same movement above described will be repeated. v

W lat we claim, and desire to-seeure by Letters Psacnt,isf I l. An.electro-magnetic striking apparatus, provided with a revolving hammer driven motor, and an eleetro-magnctwhich controls the action of the pins, studs, stops, detents, or their equivalents, substantially as herein described.

- 2. In'comhiuation with the revolving hammer andelectro-magnet, the pin A, which prevents the revo-,

lution of the hamnier while the magnetremains charged'and the circuit closed, substantially as herein described.

CHARLES WILLIAMS, Jn. [L. s.] JEROME BEDDING. Lu s.)

Witnesses HENRY S. Rowe,- JOHN M. .BATCIIELDEB.

by a weight or other 

